Codes to know for Dwelling service calculations - Part 2

According to the 2023 National Electrical Code (NEC) Article 220.53, when calculating the load for four or more fastened-in-place appliances in a dwelling unit, which of the following statements is correct?

Apply a 75% demand factor to any number of fastened-in-place appliances, regardless of type.

Apply a 75% demand factor only if each appliance is rated less than 500 watts.

Apply a 75% demand factor to all appliances, including electric ranges and clothes dryers.

Apply a 75% demand factor to four or more fastened-in-place appliances, excluding electric ranges, clothes dryers, space heating equipment, air-conditioning equipment, and electric vehicle supply equipment (EVSE).

Using the standard method of load calculations and Table 220.45 for lighting load demand factors in the 2023 NEC, how would you calculate the demand load for a dwelling unit with a total calculated lighting load of 15,000 volt-amperes?

15,000 VA at 35%

The first 3,000 VA at 100%, the next 12,000 VA at 35%, and the remainder at 25%

The first 3,000 VA at 100%, and the remainder at 35%

15,000 VA at 100%

Using the standard method of load calculations and Table 220.54 of the 2023 NEC, what demand factor would be applied to a load calculation for 6 household electric clothes dryers?

65%

75%

100%

85%

Codes to know for Dwelling service calculations – Part 2

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Codes to know for Dwelling service calculations – Part 2

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